 /*******************************************************************************
  * Copyright (c) 2000, 2005 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.ui.internal.dialogs;

 import java.util.Arrays ;
 import java.util.HashSet ;

 import org.eclipse.core.runtime.Platform;
 import org.eclipse.jface.preference.IPreferenceStore;
 import org.eclipse.jface.preference.PreferencePage;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.layout.GridData;
 import org.eclipse.swt.layout.GridLayout;
 import org.eclipse.swt.widgets.Composite;
 import org.eclipse.swt.widgets.Control;
 import org.eclipse.swt.widgets.Label;
 import org.eclipse.swt.widgets.Table;
 import org.eclipse.swt.widgets.TableItem;
 import org.eclipse.ui.IWorkbench;
 import org.eclipse.ui.IWorkbenchPreferencePage;
 import org.eclipse.ui.PlatformUI;
 import org.eclipse.ui.internal.IPreferenceConstants;
 import org.eclipse.ui.internal.IWorkbenchHelpContextIds;
 import org.eclipse.ui.internal.Workbench;
 import org.eclipse.ui.internal.WorkbenchMessages;
 import org.eclipse.ui.internal.util.PrefUtil;
 import org.osgi.framework.Constants;

 /**
  * The Startup preference page.
  */
 public class StartupPreferencePage extends PreferencePage implements
         IWorkbenchPreferencePage {
     private Table pluginsList;

     private Workbench workbench;

     /**
      * @see PreferencePage#createContents(Composite)
      */
     protected Control createContents(Composite parent) {
         PlatformUI.getWorkbench().getHelpSystem().setHelp(parent,
                 IWorkbenchHelpContextIds.STARTUP_PREFERENCE_PAGE);

         Composite composite = createComposite(parent);

         createEarlyStartupSelection(composite);

         return composite;
     }

     protected Composite createComposite(Composite parent) {
         Composite composite = new Composite(parent, SWT.NULL);
         GridLayout layout = new GridLayout();
         layout.marginWidth = 0;
         layout.marginHeight = 0;
         composite.setLayout(layout);
         GridData data = new GridData(GridData.FILL_BOTH
                 | GridData.VERTICAL_ALIGN_FILL | GridData.HORIZONTAL_ALIGN_FILL);
         composite.setLayoutData(data);
         composite.setFont(parent.getFont());

         return composite;
     }

     protected void createEarlyStartupSelection(Composite parent) {
         Label label = new Label(parent, SWT.NONE);
         label.setText(WorkbenchMessages.StartupPreferencePage_label);
         label.setFont(parent.getFont());
         GridData data = new GridData(GridData.FILL_HORIZONTAL);
         label.setLayoutData(data);
         pluginsList = new Table(parent, SWT.BORDER | SWT.CHECK | SWT.H_SCROLL
                 | SWT.V_SCROLL);
         data = new GridData(GridData.FILL_BOTH);
         pluginsList.setFont(parent.getFont());
         pluginsList.setLayoutData(data);
         populatePluginsList();
     }

     private void populatePluginsList() {
         String pluginIds[] = workbench.getEarlyActivatedPlugins();
         HashSet disabledPlugins = new HashSet (Arrays.asList(workbench.getDisabledEarlyActivatedPlugins()));
         for (int i = 0; i < pluginIds.length; i++) {
             String pluginId = pluginIds[i];
             TableItem item = new TableItem(pluginsList, SWT.NONE);
             item.setText((String ) Platform.getBundle(pluginId).getHeaders().get(
                     Constants.BUNDLE_NAME));
             item.setData(pluginId);
             item.setChecked(!disabledPlugins.contains(pluginId));
         }
     }

     /**
      * @see IWorkbenchPreferencePage
      */
     public void init(IWorkbench workbench) {
         this.workbench = (Workbench) workbench;
     }

     /**
      * @see PreferencePage
      */
     protected void performDefaults() {
         TableItem items[] = pluginsList.getItems();
         for (int i = 0; i < items.length; i++) {
             items[i].setChecked(true);
         }
     }

     /**
      * @see PreferencePage
      */
     public boolean performOk() {
         StringBuffer preference = new StringBuffer ();
         TableItem items[] = pluginsList.getItems();
         for (int i = 0; i < items.length; i++) {
             if (!items[i].getChecked()) {
                 preference.append((String ) items[i].getData());
                 preference.append(IPreferenceConstants.SEPARATOR);
             }
         }
         String pref = preference.toString();
         IPreferenceStore store = PrefUtil.getInternalPreferenceStore();
         store.putValue(IPreferenceConstants.PLUGINS_NOT_ACTIVATED_ON_STARTUP,
                 pref);
         PrefUtil.savePrefs();
         return true;
     }
 }

